Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

First band

Required string input.

Second band

Required string input.

Third band

Required string input.

Decode a three-band inductor color code into inductance in microhenries. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Inductance (µH)

The resulting inductance returned as a number.

• Inductor calculations depend on core material, air gap, turns, frequency, waveform, temperature, DC bias, copper resistance, skin and proximity effects, fringing, and saturation definition. Small-signal inductance and nominal current rating may not describe switching operation.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Capacitor Color Code

  Decode a three-band capacitor color code into capacitance in nanofarads.

• Resistor Color Code Decode

  Decode a three-band resistor color code into resistance in ohms.

• SMD Resistor Code

  Decode a three-digit SMD resistor code into resistance in ohms.